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Janet
Does pale or burnt leaf edge in camell/magnol/ferns mean Mg deficiency? Not thriving. pH 7.5 - 8.0

Despite addition of compost and well rotted manure, many of my plants are failing to thrive. As above, I wondered if they are Mg deficient. Many of my natives (Banksias, eriostemons, isopogons, dianellas) are severely chlorotic in new foliage but some are not responding at all, or extremely slowly, to large doses of chelated iron. I wondered if some other mineral deficiency might be preventing them taking up the Fe. Also would your product Acitone help?

Sincerely
Janet (Ballarat)

Submitted: 02:49PM, 07 Jun 2010
Answer: Dear Janet,

Magnesium deficiency shows up as yellowing between leaf veins which stay green. You will notice this leaf yellowing especially on the older leaves of the plant.

Camellias prefer to grow in a lightly acidic soil with a pH of between 5 – 6. From what you say, your pH is too high so you will need to lower the pH to suit the requirements of this particular group of plants. Acitone is a Yates product which when applied will lower the pH and provide the plant with nitrogen, iron and sulphur which are often deficient in soils.

For full effect, it would be best to apply this product in Spring when the soils are warming up and the plant is able to take up the necessary nutrients.

You may need to apply the acitone on more than one occasions to correct and maintain the acidity of your soil. When applying a fertiliser, pick one that is specially formulated for acid loving plants.

Answered: 12:27PM, 15 Jun 2010

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